Tube-clamp.



O KRAUSKOPF.

TUBE GLAMP. APPLICATION FILED NOV. 22, 1911.

' Patented May 28,1912.

UNITED STATES PATENT OFFICE.

OSCAR KnA sKoPr, or FREDERIGKSBUBG, TEXAS.

TUBE-CLAMP.

Specification of Letters Patent.

Application filed November 22, 1911.

Patented. May 28,1912.

Serial No. 661,807.

raising and lowering pipe sections in wells;

and it consists in the novel construction and combination of the partshereinafter fully with its members slid out of engagement with the pipeand with each other. Fig. 3 is a side view of the clamp shown in Fig. 2,but turned one-quarter around. Fig. 4 is a detail side view of amodification of the upper clamp member. Fig. 5 is an end view of thesame.

The pipe section or tube 2 is provided with a screwthreadedcoupling-sleeve 3 at its upper end in the usual way.

The lower clamp member is formed of a channel-shaped plate 4 of sheetmetal which bears against one side of the pipe, and which has sideportions 5 which project across the pipe. The upper parts of the sideportions 5 have V-shaped notches 6 cut in them, and forming upwardlyprojecting inclined planes 7. The plate 4 has at its upper end anofi'set tongue 8 which terminates in an eye 9. This tongue 8 is offsetto clear the coupling-sleeve 3, and a cord 10 or any other approvedhoisting device is connected to the eye 9. p

The upper clamp member is formed of a channel-shaped plate 12 of sheetmetal which bears against the other side of the pipe 2 from the plate 4.The plate 12 has side portions 13 which project across the pipe. Theseside portions have V-shaped notches 14 which form downwardly projectinginclined planes 15. A cord 16 or other lifting device is attached to theback of the plate 12. The top of the plate 12 is arranged to bearagainst the underside of the coupling-sleeve 3, and the inclined planes15 are arranged in engagement with the inclined planes 7.

When the pipe is raised by the cord 10 the inclined planes draw theplates 4 and 12 toward each other and thereby clamp the pipe betweenthem. When the pipe has been lowered into the well, the lower clampmember is let down to the position shown in Fig. 2, 'so that the clampmembers are disengaged from each other and from the pipe, and can bedrawn up.

In the modification shown in Figs. 4 and 5, the upper clamp member haslaterally projecting pins 20 instead of inclined planes or projections.The inclined planes of the lower clamp member engage with theprojections 20 so that the pipe. is clamped in a similar manner to thathereinbefore described.

These clamp members are made of different sizes to suit differentdiameters of pipe, but as packing pieces can be inserted between theclamp members and the pipes it is not necessary to have a separate clampfor each size of pipe.

What I claim is:

1. A tube clamp, comprising a lower clamp member formed of achannel-shaped plate having upwardly projecting inclined planes at itssides, an upper clamp memb'er formed of a channel-shaped plate havingprojections-which engage with the said inclined planes, and means forraising and lowering the said clamp members.

2. A tube clamp, comprising a lower clamp member formed of a channelshaped plate having upwardly projecting inclined planes at its sides,said plate having also an offset tongue which extends upwardly from themiddle part of its top edge, an upper clamp member formed of achannelshaped plate having projections which engage with the saidinclined planes, and means for raising and lowering the said clampmembers.

3. A tube clamp, comprising a lower clamp member formed of achannel-shaped plate having upwardly projecting inclined planes at itssides, an upper clamp member formed of a channel-shaped plate havingdownwardly projecting inclined planes at its sides which engage with theaforesaid 10 planes, and means for raising and lowering the said clampmembers.

In testimony whereof I have aifixed my signature in the presence of twowitnesses.

OSCAR KRAUSKOPF. Witnesses ADOLPH WEHMEYER, ED PETER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

